Between five and 10 tornadoes usually hit the office’s coverage area between Jan. 1 and June 30, Kisner said. The weather service has calculated there’s a 3-1 chance a tornado will occur in Nebraska during this period.

Tornadoes are especially common in the 30-county area because they are in the northern part of Tornado Alley, a tornado-prone region stretching from West Texas to North Dakota.